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BTW you can use sysctl(8) instead of echoing stuff around:
sysctl -w kernel.shmmax=0x7fffffff
in case you never understood the "permission error", cinelerra did recommend "echo ... > ..." [as root], and you did "sudo echo ... > ...". If smart people at canonical would actually care to explain you'd probably know that your form means "run sudo echo and redirect its output to a file" to shell (redirection is done by shell running as user), and cinelerra's means running sufficiently empowered shell to begin with.
sysctl is better since it has no such intricacies, and more: it has a config file, /etc/sysctl.conf, where this stuff can be fixated to get adjusted at boot.
[Modified by: Michael Shigorin on October 10, 2007 08:48 PM]
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